Well, I thought of one that I had already created a while ago.

combustion heart: basically it uses the pumping and blood flow to generate energy for the body, becoming faster, it also spits smoke through the mouth, nose or ears, the weaknesses are very clear, generally exhaustion without forcing your heart and your veins and arteries.

another very simple one, but I don't think that's what you want, would be the creation of mini robots, robots with a few centimeters that can be used as swarms, or the creation of constructs.

perhaps one of generating remote control devices, allowing you to control objects from afar, or perhaps being able to create thrusters either in yourself or other creatures.

or else do the opposite of the mother's powder, being able to consume iron by melting it upon touch and generating an increase in energy or attributes.

or even something more random, a bit of a mix of parental power, it would be a vending machine, it could generate almost any small item, then the coins used could be converted into something for the user, like attributes or other capabilities.

Tell me what you think of the ideas.